The following Crosstex® Surgical Masks are intended for use in infection control practices to minimize contamination caused by inhaled and exhaled microorganisms and reduce the potential exposure of the wearer to blood and body fluids.

Crosstex® Isolite® Earloop Face Masks Blue, Pink .
Crosstex® Isofluid® Earloop Face Masks Blue, Pink, White, Green .
Crosstex® Isofluid FogFree® Earloop Face Masks Blue, Peach .
Crosstex® Isofluid FogFree® Face Masks with Splash Visor Blue, Peach ●
. Crosstex® Procedural Earloop Face Masks - Blue, Pink, Yellow
Crosstex® Ultra Fluid Resistant No-Fog® Earloop Face Masks Blue .
Crosstex® Ultra Fluid Resistant No-Fog® Face Masks with Splash Visor Blue ●

Device Description

The seven (7) Crosstex® Surgical Masks are constructed of either an inner/outer facing of tissue or 100% spunbonded polypropylene, a 100% meltblown polypropylene filter media, with white elastic loops and/or a fogfree strip. The nose piece for all seven (7) Crosstex® Surgical Masks is 27 gauge aluminum wire, some have an anti-fog strip, with the Crosstex® Ultra Fluid Resistant No Fog® having a vapor barrier. All of the materials used in the construction of the Crosstex® Surgical Masks are being used in currently marketed devices (see predicate information).

AI/ML Overview

This 510(k) summary (K082258) describes the Crosstex® Surgical Masks. The document does not describe an AI/ML device, and therefore the standard questions about acceptance criteria, study design, and ground truth for such a device are not applicable.

The submission is for surgical masks and primarily relies on non-clinical performance testing to demonstrate substantial equivalence to predicate devices.

Here's the information as it relates to the provided document:

1. A table of acceptance criteria and the reported device performance

Test	Acceptance Criteria	Reported Device Performance
Fluid Resistance (Liquid (Water) Resistance Test/Impact Penetration Test)	Not explicitly stated, implied to meet requirements of "relevant test standards"	"Performance Testing met all relevant requirements of the aforementioned test standards."
Bacterial Filtration Efficiency (BFE)	Not explicitly stated, implied to meet requirements of "relevant test standards"	"Performance Testing met all relevant requirements of the aforementioned test standards."
Differential Pressure (△P)	Not explicitly stated, implied to meet requirements of "relevant test standards"	"Performance Testing met all relevant requirements of the aforementioned test standards."
Flammability Testing	Not explicitly stated, implied to meet requirements of "relevant test standards"	"Performance Testing met all relevant requirements of the aforementioned test standards."
Latex Particle Challenge Test	Not explicitly stated, implied to meet requirements of "relevant test standards"	"Performance Testing met all relevant requirements of the aforementioned test standards."
Biocompatibility Testing (Per ISO 10993)	Not explicitly stated, implied to meet requirements of "relevant test standards"	"Performance Testing met all relevant requirements of the aforementioned test standards."

2. Sample sizes used for the test set and the data provenance (e.g., country of origin of the data, retrospective or prospective)

This information is not provided in the 510(k) summary. The document mentions "Performance Testing" but does not detail the specific sample sizes used for each test or the provenance of the test data.

3. Number of experts used to establish the ground truth for the test set and the qualifications of those experts (e.g., radiologist with 10 years of experience)

This is not applicable as the device is not an AI/ML diagnostic tool that requires expert-established ground truth from a test set. The evaluation is based on objective physical and biological performance tests.

4. Adjudication method (e.g., 2+1, 3+1, none) for the test set

This is not applicable as there is no mention of human adjudication in the context of establishing ground truth for a test set.

5. If a multi reader multi case (MRMC) comparative effectiveness study was done, If so, what was the effect size of how much human readers improve with AI vs without AI assistance

This is not applicable as the device is not an AI/ML system and therefore no MRMC study was conducted.

6. If a standalone (i.e., algorithm only without human-in-the-loop performance) was done

This is not applicable as the device is not an AI/ML algorithm.

7. The type of ground truth used (expert consensus, pathology, outcomes data, etc)

The "ground truth" in this context is the results of standardized laboratory performance tests (e.g., BFE, fluid resistance, flammability) against established benchmarks or predicate device performance. It's not based on expert consensus, pathology, or outcomes data in the way an AI diagnostic tool would be.

8. The sample size for the training set

This is not applicable as there is no AI/ML model that requires a training set.

9. How the ground truth for the training set was established

This is not applicable as there is no AI/ML model that requires a training set.

Summary

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OCT 1 6 2008

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510(k) SUMMARY

This summary of 510(k) safety and effectiveness information is being submitted in accordance with the requirements of SMDA 1990 and 21 CFR §807.92.

The assigned 510(k) number is:

1. Submitter's Identification:

Crosstex International, Inc. 10 Ranick Road Hauppauge, New York 11788 Tel No .: 631-582-6777 Fax No.: 631-582-1726

Contact Person:

Mr. Gary Steinberg President Crosstex International, Inc. 10 Ranick Road Hauppauge, New York 11788 Tel No .: 631-582-6777 Fax No .: 631-582-1726

Date Summary Prepared: July 1, 2008

2. Name of Device:

. Crosstex® Isolite® Earloop Face Masks - Blue, Pink
� Crosstex® Isofluid® Earloop Face Masks – Blue, Pink, White, Green
Crosstex® Isofluid FogFree® Earloop Face Masks Blue, Peach ●
. Crosstex® Isofluid FogFree® Face Masks with Splash Visor - Blue, Peach
. Crosstex® Procedural Earloop Face Masks - Blue, Pink, Yellow
- Crosstex® Ultra Fluid Resistant No-Fog® Earloop Face Masks Blue
. Crosstex® Ultra Fluid Resistant No-Fog® Face Masks with Splash Visor -Bluc

3. Predicate Device Information:

a. American Threshold Industries, Surgical Masks, K# 801036, Asheville, North Carolina.
b. American Threshold Industries, Fluid Resistant Masks, K# 955556, Enka, North Carolina.

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4. Device Description:

5. Intended Use:

Crosstex® Isolite® Earloop Face Masks Blue, Pink .
Crosstex® Isofluid® Earloop Face Masks Blue, Pink, White, Green ●
. Crosstex® Isofluid FogFree® Earloop Face Masks - Blue, Peach
. Crosstex® Isofluid FogFree® Face Masks with Splash Visor -- Blue, Peach
. Crosstex® Procedural Earloop Face Masks - Blue, Pink, Yellow
Crosstex® Ultra Fluid Resistant No-Fog® Earloop Face Masks Blue .
. Crosstex® Ultra Fluid Resistant No-Fog® Face Masks with Splash Visor -Blue

6. Comparison to Predicate Devices:

See Attached

7. Discussion of Non-Clinical Tests Performed for Determination of Substantial Equivalence are as follows:

a. Fluid Resistance:
- Liquid (Water) Resistance Test/Impact Penetration Test
b. Bacterial Filtration Efficiency (BFE) / Differential Pressure (△P) Tests
c. Flammability Testing
d. Latex Particle Challenge Test
Biocompatibility Testing Per ISO 10993 e.

It was our conclusion that Performance Testing met all relevant requirements of the aforementioned test standards.

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8. Discussion of Clinical Test Performed:

Not Applicable

9. Conclusions:

The Crosstex® Surgical Masks have the same intended use and technological characteristics as the predicate devices. Moreover, bench testing contained in this submission supplied demonstrates that the technological characteristics do no raise any new questions of safety or effectiveness. The Crosstex® Surgical Masks are substantially equivalent to the predicate device.

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Food and Drug Administration 9200 Corporate Boulevard Rockville MD 20850

OCT 1 6 2008

Crosstex International, Incorporated Mr. Richard M. Ormsbee Senior Regulatory Affairs Specialist Minntech Corporation 14605 28th Avenue North Minneapolis, Minnesota 55447-4822

Re: K082258

Trade/Device Name: Crosstex® Surgical Masks Regulation Number: 21 CFR 878.4040 Regulation Name: Surgical Apparel Regulatory Class: II Product Code: FXX Dated: September 17, 2008 Received: September 18, 2008

Dear Mr. Ormsbee:

We have reviewed your Section 510(k) premarket notification of intent to market the device referenced above and have determined the device is substantially equivalent (for the indications for use stated in the enclosure) to legally marketed predicate devices marketed in interstate commerce prior to May 28, 1976, the enactment date of the Medical Device Amendments, or to devices that have been reclassified in accordance with the provisions of the Federal Food, Drug, and Cosmetic Act (Act) that do not require approval of a premarket approval application (PMA). You may, therefore, market the device, subject to the general controls provisions of the Act. The general controls provisions of the Act include requirements for annual registration, listing of devices, good manufacturing practice, labeling, and prohibitions against misbranding and adulteration.

If your device is classified (see above) into either class II (Special Controls) or class III (PMA), it may be subject to such additional controls. Existing major regulations affecting your device can be found in the Code of Federal Regulations, Title 21, Parts 800 to 898. In addition, FDA may publish further announcements concerning your device in the Federal Register.

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Page 2 - Mr. Ormsbee

Please be advised that FDA's issuance of a substantial equivalence determination does not mean that FDA has made a determination that your device complies with other requirements of the Act or any Federal statutes and regulations administered by other Federal agencies. You must comply with all the Act's requirements, including, but not limited to: registration and listing (21 CFR Part 807); labeling (21 CFR Part 801); good manufacturing practice requirements as set forth in the quality systems (QS) regulation (21 CFR Part 820); and if applicable, the electronic product radiation control provisions (Sections 531-542 of the Act); 21 CFR 1000-1050.

This letter will allow you to begin marketing your device as described in your Section 510(k) premarket notification. The FDA finding of substantial equivalence of your device to a legally marketed predicate device results in a classification for your device and thus, permits your device to proceed to the market.

If you desire specific advice for your device on our labeling regulation (21 CFR Part 801), please contact the Center for Devices and Radiological Health's (CDRH's) Office of Compliance at (240) 276-0115. Also, please note the regulation entitled, "Misbranding by reference to premarket notification" (21CFR Part 807.97). For questions regarding postmarket surveillance, please contact CDRH's Office of Surveillance and Biometric's (OSB's) Division of Postmarket Surveillance at 240-276-3474. For questions regarding the reporting of device adverse events (Medical Device Reporting (MDR)), please contact the Division of Surveillance Systems at 240-276-3464. You may obtain other general information on your responsibilities under the Act from the Division of Small Manufacturers, International and Consumer Assistance at its toll-free number (800) 638-2041 or (240) 276-3150 or at its Internet address http://www.fda.gov/cdrh/industry/support/index.html.

Sincerely yours,

CBR

Chiu Lin, Ph.D. Director Division of Anesthesiology, General Hospital, Infection Control and Dental Devices Office of Device Evaluation Center for Devices and Radiological Health

Enclosure

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Indications for Use

510(k) Number (if known): K082258

Device Name: Crosstex® Surgical Masks

Indications for Use:

Crosstex® Isolite® Earloop Face Masks Blue, Pink .
Crosstex® Isofluid® Earloop Face Masks Blue, Pink, White, Green .
Crosstex® Isofluid FogFree® Earloop Face Masks Blue, Peach .
Crosstex® Isofluid FogFree® Face Masks with Splash Visor Blue, Peach ●
. Crosstex® Procedural Earloop Face Masks - Blue, Pink, Yellow
Crosstex® Ultra Fluid Resistant No-Fog® Earloop Face Masks Blue .
Crosstex® Ultra Fluid Resistant No-Fog® Face Masks with Splash Visor Blue ●

Prescription Use (Part 21 CFR 801 Subpart D)

AND/OR

Over-The-Counter Use (21 CFR 801 Subpart C)

(PLEASE DO NOT WRITE BELOW THIS LINE-CONTINUE ON ANOTHER PAGE OF NEEDED)

Concurrence of CDRH, Office of Device Evaluation (ODE)

Shule A Murphy, MD
(Division Sign-Off)

Division of Anesthesiology, General Hospital Infection Control, Dental Devices

510(k) Number:

Page 1 of 1

Regulation Number and Section

§ 878.4040 Surgical apparel.

(a)
Identification. Surgical apparel are devices that are intended to be worn by operating room personnel during surgical procedures to protect both the surgical patient and the operating room personnel from transfer of microorganisms, body fluids, and particulate material. Examples include surgical caps, hoods, masks, gowns, operating room shoes and shoe covers, and isolation masks and gowns. Surgical suits and dresses, commonly known as scrub suits, are excluded.(b)
Classification. (1) Class II (special controls) for surgical gowns and surgical masks. A surgical N95 respirator or N95 filtering facepiece respirator is not exempt if it is intended to prevent specific diseases or infections, or it is labeled or otherwise represented as filtering surgical smoke or plumes, filtering specific amounts of viruses or bacteria, reducing the amount of and/or killing viruses, bacteria, or fungi, or affecting allergenicity, or it contains coating technologies unrelated to filtration (e.g., to reduce and or kill microorganisms). Surgical N95 respirators and N95 filtering facepiece respirators are exempt from the premarket notification procedures in subpart E of part 807 of this chapter subject to § 878.9, and the following conditions for exemption:(i) The user contacting components of the device must be demonstrated to be biocompatible.
(ii) Analysis and nonclinical testing must:
(A) Characterize flammability and be demonstrated to be appropriate for the intended environment of use; and
(B) Demonstrate the ability of the device to resist penetration by fluids, such as blood and body fluids, at a velocity consistent with the intended use of the device.
(iii) NIOSH approved under its regulation.
(2) Class I (general controls) for surgical apparel other than surgical gowns and surgical masks. The class I device is exempt from the premarket notification procedures in subpart E of part 807 of this chapter subject to § 878.9.